upgrade to github actions for ci

.github/workflows/build.yml

@@ -0,0 +1,39 @@
+name: Build
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+    types: [opened, reopened, synchronize]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [10, 12, 13, 14]
+    steps:
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - uses: actions/checkout@v1
+      - run: npm install
+      - run: npm run test
+
+      - run: npm run coverage
+        if: ${{ matrix.node-version == 12 }}
+      - uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+        if: ${{ matrix.node-version == 12 }}
+  test-browser:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+      - uses: actions/checkout@v1
+      - run: npm install
+      - run: npm run test:browser

karma.conf.js

@@ -0,0 +1,44 @@
+module.exports = function (config) {
+  config.set({
+    frameworks: ['browserify', 'tap'],
+
+    files: ['dist/bundle.js', './test/**/*.js'],
+
+    // Exclude [test/node.js, test/net, test/sync, test/service] due to error: `Sorry, but CommonJS module replacement with td.replace() is only supported under Node.js runtimes.`
+    // Exclude [test/rpc] due to error: `TypeError: superCtor is undefined`
+    // Exclude [test/util/parse] due to hanging on `should parse geth params file`
+    // Exclude [test/logging] due to error: `TypeError: logger.format is undefined`
+    exclude: [
+      './test/node.js',
+      './test/net/**/*.js',
+      './test/sync/**/*.js',
+      './test/service/**/*.js',
+      './test/util/parse.js',
+      './test/logging.js',
+      './test/rpc/**/*.js',
+      './test/integration/**/*.js'
+    ],
+
+    preprocessors: {
+      './test/**/*.js': ['browserify']
+    },
+
+    reporters: ['progress'],
+
+    browsers: ['FirefoxHeadless', 'ChromeHeadless'],
+
+    colors: true,
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: true,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: Infinity,
+
+    // Fail after timeout
+    browserDisconnectTimeout: 100000,
+    browserNoActivityTimeout: 100000
+  })
+}

package.json

@@ -11,15 +11,15 @@
     "lib"
   ],
   "scripts": {
-    "coverage": "nyc npm run test && nyc report --reporter=text-lcov > .nyc_output/lcov.info",
-    "coveralls": "npm run coverage && coveralls <.nyc_output/lcov.info",
+    "coverage": "nyc npm run test && nyc report --reporter=lcov",
     "docs": "jsdoc2md --no-cache -c .jsdoc.json lib/*.js > docs/API.md",
     "lint": "standard",
     "lint:fix": "standard --fix",
     "unit": "tape 'test/!(integration)/**/*.js'",
     "integration": "tape 'test/integration/**/*.js'",
     "test": "npm run lint && npm run unit && npm run integration",
-    "build": "npm run test && browserify browser/index.js -s ethereumjs -t babelify --outfile dist/bundle.js"
+    "test:browser": "npm run build && karma start karma.conf.js",
+    "build": "browserify browser/index.js -s ethereumjs -t babelify --outfile dist/bundle.js"
   },
   "husky": {
     "hooks": {
@@ -90,9 +90,13 @@
     "@babel/runtime-corejs2": "^7.1.2",
     "babelify": "^10.0.0",
     "browserify": "^16.2.3",
-    "coveralls": "^3.0.0",
     "husky": "^2.1.0",
     "json-to-markdown": "^1.0.4",
+    "karma": "^5.0.9",
+    "karma-browserify": "^7.0.0",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-firefox-launcher": "^1.3.0",
+    "karma-tap": "^4.2.0",
     "nyc": "~13.3.0",
     "pino": "^5.8.0",
     "pino-pretty": "^2.2.2",